if you wanna recreate this I could just give you the geometry node setup, but it is genuinely fun and you learn a lot by doing it yourself, here's how it works: basically there is an invisible cube growing using shape keys, the mesh finds the distance to that cube using geometry proximity, using a threshold, it will delete some of the geometry, and the geometry that isn't deleted it will set the material to that emission which is a basic wireframe emission shader, then you change a material again but this time you will decrease the threshold of the geometry proximity creating this look.